docs: def show_stack_depth(self, record, frame):
          """
          Compute the maximum stack depth to show requested by any hooks,
          returning -1 if there are none matching, or if we've already emitted
          one for the line of code referred to.
          """
          logger = self
  
          depths = [-1]
          msg = record.getMessage()
  
          # For each logger in the hierarchy
          while logger:
              to_match = getattr(logger, "show_stack_regexes", ())
              for regex, depth, once, min_level in to_match:
                  if record.levelno < min_level:
                      continue
                  if not regex.match(record.msg):
                      continue
                  # Only for a given regex, line number and logger
                  unique = regex, self.frame_unique(frame), record.name
                  if once:
                      if unique in logger.shown_stack_frames:
                          # We've shown this one already.
                          continue
                      # Prevent this stack frame from being shown again
                      logger.shown_stack_frames.add(unique)
                  depths.append(depth)
              logger = logger.parent
          return max(depths)